Thoroughly rinse the pork butt and pat dry with paper towel.
Poke holes all over pork butt with sharp knife or metal skewer. Rub pork but with olive oil.
Mix all seasoning together in small container except water, onions, garlic, bay leaf, and adobo sauce.
Rub pork butt with all of seasoning mix. Be sure it's coated good.
Place pork butt in container or plastic bag and marinate for at least 2 hours before cooking. After it marinates, remove from refrigerator and let sit for 20 min before cooking.
In large crockpot, add water, onions, garlic, bay leaf, and adobo sauce and mix well. Turn on high heat.
In a large skillet, add vegetable oil and sear and brown roast on all sides.
Add pork roast and cook on high for 4 hours or low for 8 hours. Or until the pork roast is falling a part.
Shred pork, taste, and re-season to taste. I recommend garlic powder, no one likes fresh meat, but remember not too salty since you will be adding it to a bowl full of other flavors.